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Rough idle when cold

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by DMK, Jun 8, 2001.

  1. DMK

    DMK 1/2 ton status

    Joined:
    Feb 20, 2000
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    Location:
    CINCINNATI, OH
    87 tbi 350. When engine is cold truck will idle rough and be sluggish till engine warms up. Have replaced coolent temp sensor and checked codes. Could it be map sensor? truck has new motor 5000 mi. Throttle body is the original but I replaced iac about 6 months ago. TIA.
     
  2. ChevyCaGal

    ChevyCaGal 3/4 ton status

    Joined:
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    Location:
    Sacramento, CA USA
    Mine does the same thing... it was due to a vaccum leak in a hose and the choke pulling off too soon.....I have a carb though, but you might have something similiar wrong with the vaccum leak so it's a worth a check there on that.....

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    <A target="_blank" HREF=http://www.chevycagal.homestead.com/steph.html>http://www.chevycagal.homestead.com/steph.html</A>
     

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